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Finding the Fourth Proportional to 60.91, 90.92 and 56.64

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Solution

The fourth proportional to 60.91, 90.92 and 56.64 is: 84.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    60.91 : 90.92 = 56.64 : x
  2. Step 2: Convert to fraction form
    60.91/90.92 = 56.64/x
  3. Step 3: Cross multiply
    60.91x = 90.92 × 56.64
  4. Step 4: Simplify right side
    60.91x = 5,149.71
  5. Step 5: Solve for x
    x = 5,149.71/60.91
  6. Step 6: Final answer
    x = 84.55

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.